Add warning notation about using 'bomb' setting.
diff --git a/Misc/vimrc b/Misc/vimrc
index 85ce348..9e56281 100644
--- a/Misc/vimrc
+++ b/Misc/vimrc
@@ -67,7 +67,9 @@
" Set the default file encoding to UTF-8: ``set encoding=utf-8``
" Put a marker at the beginning of the file to differentiate between UTF and
-" UCS encoding: ``set bomb``
+" UCS encoding (warning: always done when reasonable, which can mess up shells
+" into thinking a text file is actually a binary file when executing the text
+" file): ``set bomb``
" For full syntax highlighting:
"``let python_highlight_all=1``